diff --git a/UI/FFmpegDownloadUI.cs b/UI/FFmpegDownloadUI.cs
index b0f06c0..03dfb8f 100644
--- a/UI/FFmpegDownloadUI.cs
+++ b/UI/FFmpegDownloadUI.cs
@@ -22,7 +22,12 @@ namespace ADOFAIRenderer.UI
         private TextMeshProUGUI _statusText = null!;
 
         private bool _isDownloading;
-        private readonly string _downloadUrl = "https://github.com/BtbN/FFmpeg-Builds/releases/download/latest/ffmpeg-master-latest-win64-gpl-shared.zip";
+        private string DownloadUrl => Application.platform switch
+        {
+            RuntimePlatform.WindowsPlayer => "https://github.com/BtbN/FFmpeg-Builds/releases/download/latest/ffmpeg-master-latest-win64-gpl-shared.zip",
+            RuntimePlatform.OSXPlayer => "https://github.com/ColorsWind/FFmpeg-macOS/releases/download/n5.0.1-patch3/FFmpeg-shared-n5.0.1-OSX-universal.zip",
+            _ => "https://github.com/BtbN/FFmpeg-Builds/releases/download/latest/ffmpeg-master-latest-linux64-gpl-shared.tar.xz"
+        };
         
         private System.Threading.CancellationTokenSource? _cts;
         private readonly System.Collections.Concurrent.ConcurrentQueue<Action> _mainThreadQueue = new();
@@ -32,8 +37,14 @@ namespace ADOFAIRenderer.UI
             var userLibs = MelonEnvironment.UserLibsDirectory;
             if (!Directory.Exists(userLibs)) return false;
             
-            // Check for avcodec-*.dll
-            var files = Directory.GetFiles(userLibs, "avcodec-*.dll");
+            string searchPattern = Application.platform switch
+            {
+                RuntimePlatform.WindowsPlayer => "avcodec-*.dll",
+                RuntimePlatform.OSXPlayer => "libavcodec.*.dylib",
+                _ => "libavcodec.so*"
+            };
+            
+            var files = Directory.GetFiles(userLibs, searchPattern);
             return files.Length > 0;
         }
 
@@ -402,7 +413,13 @@ namespace ADOFAIRenderer.UI
                         Directory.CreateDirectory(userLibsDir);
                     }
 
-                    tempZipPath = Path.Combine(userLibsDir, "ffmpeg_temp.zip");
+                    string extension = Application.platform switch
+                    {
+                        RuntimePlatform.WindowsPlayer => ".zip",
+                        RuntimePlatform.OSXPlayer => ".zip",
+                        _ => ".tar.xz"
+                    };
+                    tempZipPath = Path.Combine(userLibsDir, "ffmpeg_temp" + extension);
                     
                     var progressReporter = new Progress<float>(percent =>
                     {
@@ -410,7 +427,7 @@ namespace ADOFAIRenderer.UI
                         UpdateStatus($"다운로드 중... ({(percent * 100f):F1}%)", new Color(0f, 0.8f, 1f));
                     });
 
-                    await DownloadFileAsync(_downloadUrl, tempZipPath, progressReporter, _cts.Token);
+                    await DownloadFileAsync(DownloadUrl, tempZipPath, progressReporter, _cts.Token);
 
                     // 다운로드 완료 후 압축 해제
                     UpdateStatus("압축 해제 및 DLL 파일 복사 중...", new Color(0.9f, 0.9f, 0.2f));
@@ -532,26 +549,84 @@ namespace ADOFAIRenderer.UI
         {
             try
             {
-                await Task.Run(() =>
+                if (Application.platform == RuntimePlatform.OSXPlayer || Application.platform == RuntimePlatform.WindowsPlayer)
                 {
-                    using var archive = ZipFile.OpenRead(zipPath);
-                    foreach (var entry in archive.Entries)
+                    await Task.Run(() =>
                     {
-                        // dll 파일만 userlibs 디렉토리 경로에 바로 복사
-                        if (entry.FullName.EndsWith(".dll", StringComparison.OrdinalIgnoreCase))
+                        var targetExtension = Application.platform == RuntimePlatform.OSXPlayer ? ".dylib" : ".dll";
+                        using var archive = ZipFile.OpenRead(zipPath);
+                        foreach (var entry in archive.Entries)
                         {
-                            var targetPath = Path.Combine(outputDirectory, entry.Name);
-                            
-                            var dir = Path.GetDirectoryName(targetPath);
-                            if (dir != null && !Directory.Exists(dir))
+                            if (entry.FullName.EndsWith(targetExtension, StringComparison.OrdinalIgnoreCase))
                             {
-                                Directory.CreateDirectory(dir);
+                                var targetPath = Path.Combine(outputDirectory, entry.Name);
+                                
+                                var dir = Path.GetDirectoryName(targetPath);
+                                if (dir != null && !Directory.Exists(dir))
+                                {
+                                    Directory.CreateDirectory(dir);
+                                }
+                                
+                                entry.ExtractToFile(targetPath, overwrite: true);
                             }
-                            
-                            entry.ExtractToFile(targetPath, overwrite: true);
                         }
-                    }
-                });
+                    });
+                }
+                else
+                {
+                    // 리눅스 (또는 기타 플랫폼) - tar.xz 해제
+                    await Task.Run(() =>
+                    {
+                        var tempExtractDir = Path.Combine(outputDirectory, "ffmpeg_temp_extracted");
+                        if (Directory.Exists(tempExtractDir))
+                        {
+                            Directory.Delete(tempExtractDir, true);
+                        }
+                        Directory.CreateDirectory(tempExtractDir);
+
+                        var archiveUnixPath = zipPath.Replace('\\', '/');
+                        var tempExtractUnixDir = tempExtractDir.Replace('\\', '/');
+
+                        var startInfo = new System.Diagnostics.ProcessStartInfo
+                        {
+                            FileName = "tar",
+                            Arguments = $"-xf \"{archiveUnixPath}\" -C \"{tempExtractUnixDir}\"",
+                            RedirectStandardOutput = true,
+                            RedirectStandardError = true,
+                            UseShellExecute = false,
+                            CreateNoWindow = true
+                        };
+
+                        using (var process = System.Diagnostics.Process.Start(startInfo))
+                        {
+                            process!.WaitForExit();
+                            if (process.ExitCode != 0)
+                            {
+                                var error = process.StandardError.ReadToEnd();
+                                throw new Exception($"tar 압축 해제 실패 (ExitCode: {process.ExitCode}): {error}");
+                            }
+                        }
+
+                        // 압축이 풀린 파일 중에서 .so 파일들을 찾아서 outputDirectory로 이동
+                        var soFiles = Directory.GetFiles(tempExtractDir, "*.so*", SearchOption.AllDirectories);
+                        foreach (var soFile in soFiles)
+                        {
+                            var fileName = Path.GetFileName(soFile);
+                            var targetPath = Path.Combine(outputDirectory, fileName);
+                            File.Copy(soFile, targetPath, true);
+                        }
+
+                        // 임시 디렉토리 정리
+                        try
+                        {
+                            Directory.Delete(tempExtractDir, true);
+                        }
+                        catch
+                        {
+                            // ignored
+                        }
+                    });
+                }
             }
             finally
             {